GATHER reporting guidelines Harry Campbell University of Edinburgh Harry.Campbell@ed.ac.uk

Guidelines for Accurate and Transparent Health Estimates Reporting: the GATHER statement

Guidelines for Accurate and Transparent Health Estimates Reporting: the GATHER statement Published 28 June 2016 Target audience – decision makers; researchers Defines best reporting practices for studies gathering data from multiple populations (in time or space) using multiple information systems Applies to all quantitative population-level estimates of heath indicators and indicators of health determinants for studies that synthesise information from multiple sources

Guidelines for Accurate and Transparent Health Estimates Reporting: the GATHER statement GATHER Working Group to define and promote good practice in reporting of global health estimates Generated list of possible reporting items 118 responses to survey on this list Consensus meeting to develop guidelines Further consultation with LMIC (130 country focal points for WHO mortality estimates)

Objectives and Funding Guidelines for Accurate and Transparent Health Estimates Reporting: the GATHER statement Objectives and Funding Define the populations, health indicators and time periods in the estimate State the sources of funding

Data Inputs (that are used in the estimate) Guidelines for Accurate and Transparent Health Estimates Reporting: the GATHER statement Data Inputs (that are used in the estimate) 3. Describe how data identified and accessed 4. Specify inclusion and exclusion criteria (and all ad-hoc exclusions) 5. Details of data sources and main characteristics Contact points, populations, data collection methods, years of data collection, age and sex range, diagnostic criteria, measurement method, sample size 6. Identify categories of data with biases

Guidelines for Accurate and Transparent Health Estimates Reporting: the GATHER statement Data Inputs (that are not generated in the study) 7. Describe and give sources of other data For all data 8. Provide all data/ meta-data in an extractable file format (or give details of group holding the rights to the data)

Guidelines for Accurate and Transparent Health Estimates Reporting: the GATHER statement Data analysis 9. Provide conceptual overview of the analysis 10. Provide detailed description of all steps in data analysis Cleaning, pre-processing, adjustments, weightings, models Describe how models evaluated and final model selected Provide evaluation of model performance, including any sensitivity analysis Describe sources of uncertainty and methods for calculating uncertainty intervals Describe how source code for analyses can be accessed

Guidelines for Accurate and Transparent Health Estimates Reporting: the GATHER statement Results and Discussion 15. Provide published results in an extractable file format 16. Report uncertainty intervals 17. Interpret results in the light of previous estimates and explain reasons for changes 18. Discuss limitations of the estimate, including data limitations and model assumptions

www.gather-statement.org

GATHER website [www.gather-statement.org] Guidelines for Accurate and Transparent Health Estimates Reporting: the GATHER statement GATHER website [www.gather-statement.org] Electronic version of 18 item checklist Minimum essential reporting items More detailed explanation of requirements for reporting Examples of good reporting Authors expected to make use of online appendices to provide full details and data

Guidelines for Accurate and Transparent Health Estimates Reporting: the GATHER statement GATHER future implications Data and code (at least key elements) to be made available online No requirement at present to give user support Hope that future funding of GBD studies will incorporate funding to cover this as part of study dissemination Anticipated that leading journals will require adherence to GATHER principles as prerequisite publication